Implement head



FIG. 1 is a side elevation of an implement head showing my new design;

FIG. 2 is an elevation as seen from the left of FIG. 1;

FIG. 3 is an elevation as seen from the right of FIG. 1;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof. 

The ornamental design for an implement head, substantially as shown and described. 